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/*
** Copyright 2003-2010, VisualOn, Inc.
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
/*******************************************************************************
File: grp_data.c
Content: Short block grouping function
*******************************************************************************/
#include "basic_op.h"
#include "psy_const.h"
#include "interface.h"
#include "grp_data.h"
/*****************************************************************************
*
* function name: groupShortData
* description: group short data for next quantization and coding
*
**********************************************************************************/
void
groupShortData(Word32 *mdctSpectrum,
Word32 *tmpSpectrum,
SFB_THRESHOLD *sfbThreshold,
SFB_ENERGY *sfbEnergy,
SFB_ENERGY *sfbEnergyMS,
SFB_ENERGY *sfbSpreadedEnergy,
const Word16 sfbCnt,
const Word16 *sfbOffset,
const Word16 *sfbMinSnr,
Word16 *groupedSfbOffset,
Word16 *maxSfbPerGroup,
Word16 *groupedSfbMinSnr,
const Word16 noOfGroups,
const Word16 *groupLen)
{
Word32 i, j;
Word32 line;
Word32 sfb;
Word32 grp;
Word32 wnd;
Word32 offset;
Word32 highestSfb;
/* for short: regroup and */
/* cumulate energies und thresholds group-wise . */
/* calculate sfbCnt */
highestSfb = 0;
for (wnd=0; wnd<TRANS_FAC; wnd++) {
for (sfb=sfbCnt - 1; sfb>=highestSfb; sfb--) {
for (line=(sfbOffset[sfb + 1] - 1); line>=sfbOffset[sfb]; line--) {
if (mdctSpectrum[wnd*FRAME_LEN_SHORT+line] != 0) break;
}
if (line >= sfbOffset[sfb]) break;
}
highestSfb = max(highestSfb, sfb);
}
if (highestSfb < 0) {
highestSfb = 0;
}
*maxSfbPerGroup = highestSfb + 1;
/* calculate sfbOffset */
i = 0;
offset = 0;
for (grp = 0; grp < noOfGroups; grp++) {
for (sfb = 0; sfb < sfbCnt; sfb++) {
groupedSfbOffset[i] = offset + sfbOffset[sfb] * groupLen[grp];
i += 1;
}
offset += groupLen[grp] * FRAME_LEN_SHORT;
}
groupedSfbOffset[i] = FRAME_LEN_LONG;
i += 1;
/* calculate minSnr */
i = 0;
offset = 0;
for (grp = 0; grp < noOfGroups; grp++) {
for (sfb = 0; sfb < sfbCnt; sfb++) {
groupedSfbMinSnr[i] = sfbMinSnr[sfb];
i += 1;
}
offset += groupLen[grp] * FRAME_LEN_SHORT;
}
/* sum up sfbThresholds */
wnd = 0;
i = 0;
for (grp = 0; grp < noOfGroups; grp++) {
for (sfb = 0; sfb < sfbCnt; sfb++) {
Word32 thresh = sfbThreshold->sfbShort[wnd][sfb];
for (j=1; j<groupLen[grp]; j++) {
thresh = L_add(thresh, sfbThreshold->sfbShort[wnd+j][sfb]);
}
sfbThreshold->sfbLong[i] = thresh;
i += 1;
}
wnd += groupLen[grp];
}
/* sum up sfbEnergies left/right */
wnd = 0;
i = 0;
for (grp = 0; grp < noOfGroups; grp++) {
for (sfb = 0; sfb < sfbCnt; sfb++) {
Word32 energy = sfbEnergy->sfbShort[wnd][sfb];
for (j=1; j<groupLen[grp]; j++) {
energy = L_add(energy, sfbEnergy->sfbShort[wnd+j][sfb]);
}
sfbEnergy->sfbLong[i] = energy;
i += 1;
}
wnd += groupLen[grp];
}
/* sum up sfbEnergies mid/side */
wnd = 0;
i = 0;
for (grp = 0; grp < noOfGroups; grp++) {
for (sfb = 0; sfb < sfbCnt; sfb++) {
Word32 energy = sfbEnergyMS->sfbShort[wnd][sfb];
for (j=1; j<groupLen[grp]; j++) {
energy = L_add(energy, sfbEnergyMS->sfbShort[wnd+j][sfb]);
}
sfbEnergyMS->sfbLong[i] = energy;
i += 1;
}
wnd += groupLen[grp];
}
/* sum up sfbSpreadedEnergies */
wnd = 0;
i = 0;
for (grp = 0; grp < noOfGroups; grp++) {
for (sfb = 0; sfb < sfbCnt; sfb++) {
Word32 energy = sfbSpreadedEnergy->sfbShort[wnd][sfb];
for (j=1; j<groupLen[grp]; j++) {
energy = L_add(energy, sfbSpreadedEnergy->sfbShort[wnd+j][sfb]);
}
sfbSpreadedEnergy->sfbLong[i] = energy;
i += 1;
}
wnd += groupLen[grp];
}
/* re-group spectrum */
wnd = 0;
i = 0;
for (grp = 0; grp < noOfGroups; grp++) {
for (sfb = 0; sfb < sfbCnt; sfb++) {
for (j = 0; j < groupLen[grp]; j++) {
Word16 lineOffset = FRAME_LEN_SHORT * (wnd + j);
for (line = lineOffset + sfbOffset[sfb]; line < lineOffset + sfbOffset[sfb+1]; line++) {
tmpSpectrum[i] = mdctSpectrum[line];
i = i + 1;
}
}
}
wnd += groupLen[grp];
}
for(i=0;i<FRAME_LEN_LONG;i+=4) {
mdctSpectrum[i] = tmpSpectrum[i];
mdctSpectrum[i+1] = tmpSpectrum[i+1];
mdctSpectrum[i+2] = tmpSpectrum[i+2];
mdctSpectrum[i+3] = tmpSpectrum[i+3];
}
}
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